STM32 HAL RCC ClockConfig Hard Fault at >65°C

Posted on March 26, 2018 at 19:11

Hopefully something like this, uphill skiing is no fun at low levels of difficulty..

/**

  * @brief  System Clock Configuration

  *         The system Clock is configured as follow :

  *            System Clock source            = PLL (HSE)

  *            SYSCLK(Hz)                     = 72000000

  *            HCLK(Hz)                       = 72000000

  *            AHB Prescaler                  = 1

  *            APB1 Prescaler                 = 2

  *            APB2 Prescaler                 = 1

  *            HSE Frequency(Hz)              = 8000000

  *            HSE PREDIV                     = 1

  *            PLLMUL                         = RCC_PLL_MUL9 (9)

  *            Flash Latency(WS)              = 2

  * @param  None

  * @retval None

  */

static void SystemClock_Config(void)

{

  RCC_ClkInitTypeDef RCC_ClkInitStruct = {0}; // Clear autos for safety

  RCC_OscInitTypeDef RCC_OscInitStruct = {0};

  /* Enable HSE Oscillator and activate PLL with HSE as source */

  RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSE;

  RCC_OscInitStruct.HSEState = RCC_HSE_ON; // Or BYPASS for external source

  RCC_OscInitStruct.HSEPredivValue = RCC_HSE_PREDIV_DIV1;

  RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;

  RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSE;

  RCC_OscInitStruct.PLL.PLLMUL = RCC_PLL_MUL9;

  if (HAL_RCC_OscConfig(&RCC_OscInitStruct)!= HAL_OK)

  {

    Error_Handler();

  }

  /* Select PLL as system clock source and configure the HCLK, PCLK1 and PCLK2

     clocks dividers */

  RCC_ClkInitStruct.ClockType = (RCC_CLOCKTYPE_SYSCLK | RCC_CLOCKTYPE_HCLK | RCC_CLOCKTYPE_PCLK1 | RCC_CLOCKTYPE_PCLK2);

  RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK;

  RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;

  RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV2;

  RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1;

  if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_2)!= HAL_OK)

  {

    Error_Handler();

  }

}